In a child with nephrotic‑range proteinuria and severe hypoalbuminemia who has a blood pressure of 90/60 mm Hg, should albumin infusion be administered?

Albumin Infusion in Pediatric Nephrotic Syndrome with Blood Pressure 90/60 mm Hg

Albumin infusion should be administered based on clinical indicators of hypovolemia (prolonged capillary refill time, tachycardia, oliguria, acute kidney injury, abdominal discomfort, or failure to thrive), NOT based on the blood pressure reading of 90/60 mm Hg alone or serum albumin levels. 1

Assessment of Volume Status is Critical

The blood pressure of 90/60 mm Hg in isolation does not determine the need for albumin infusion. You must assess for clinical signs of hypovolemia before administering albumin: 1

• Prolonged capillary refill time (>2 seconds)
• Tachycardia for age
• Oliguria or acute kidney injury
• Abdominal discomfort suggesting intravascular volume depletion
• Failure to thrive despite adequate nutritional support

If these clinical indicators of hypovolemia are present, albumin infusion is warranted. 1

If the child has good peripheral perfusion, normal heart rate, adequate urine output, and the blood pressure represents their baseline, albumin is NOT indicated regardless of the serum albumin level. 1

Albumin Administration Guidelines When Indicated

When clinical hypovolemia is confirmed: 1

• Initial dosing: 0.5-1 g/kg of 20-25% albumin infused over 1 hour
• Severe disease: May require daily infusions of 1-4 g/kg
• Frequency: Base on ongoing clinical indicators, not laboratory values
• Consider furosemide: 0.5-2 mg/kg IV bolus at the end of albumin infusion (only if NOT markedly hypovolemic or hyponatremic) 1

Important Caveats and Pitfalls

The purpose of albumin infusion is to support intravascular volume temporarily, NOT to normalize serum albumin levels. Most infused albumin is lost in urine within hours. 1

Common Pitfalls to Avoid:

• Do NOT give albumin based solely on low serum albumin levels - this is explicitly not recommended 1
• Do NOT assume hypotension equals hypovolemia - children with nephrotic syndrome can have normal or increased blood volume despite edema 1
• Avoid diuretics if hypovolemia is present - they can worsen hypovolemia and promote thrombosis 1

Serious Complications of Albumin Therapy:

Albumin infusion carries significant risks in nephrotic syndrome: 2

• Hypertension requiring acute antihypertensive therapy (46% of treatment courses)
• Respiratory distress and pulmonary edema from circulatory overload
• Electrolyte disturbances: hypokalemia (40%), hypernatremia (17%)
• Thrombosis risk if central venous access is required 1

Evidence Quality and Strength

The 2021 ERKNet-ESPN consensus guidelines (Nature Reviews Nephrology) provide the most authoritative guidance, specifically stating albumin should be used based on clinical hypovolemia indicators, not serum albumin levels. 1

Research evidence shows albumin plus furosemide increases diuresis and natriuresis compared to furosemide alone 3, but weight loss is only sustained if remission occurs 2. A Cochrane review found insufficient evidence to support routine albumin use, with only one small study meeting inclusion criteria. 4

The 2024 ICTMG guidelines recommend AGAINST routine albumin use in critically ill patients for volume replacement or to increase serum albumin levels (conditional recommendation, very low certainty evidence). 1

Clinical Decision Algorithm

1. Assess volume status clinically - check capillary refill, heart rate, urine output, perfusion 1

2. If hypovolemia present: Give albumin 0.5-1 g/kg over 1 hour, followed by furosemide 0.5-2 mg/kg IV if not severely hypovolemic 1

3. If euvolemic or hypervolemic (good perfusion, adequate BP for age): Do NOT give albumin; consider diuretics alone if fluid overload present 1

4. Monitor closely for complications: blood pressure, respiratory status, electrolytes 2

5. Refer to pediatric nephrology for complex fluid management 1